{"title":"Primers \u0026 Cleaners","description":"\u003cp\u003eThe right primer makes or breaks a coating job. Coatings Supply carries the full GAF primer matrix, matched to substrate and chemistry: GAF Multi-Purpose Primer (the field-default for asphaltic, PVC, Kynar metal, existing acrylic; 48-hour recoat window), GAF Metal Roof Primer for rusty steel, GAF Bonding Primer for non-ferrous metals (aluminum, copper) and direct-to-concrete, GAF Bleed-Block Asphalt Primer (required under silicone on asphalt to stop oil bleed), Epoxy Primer for structural concrete under acrylic systems, EPDM Activator for rinsing EPDM membranes, GAF TPO Red Primer (required for Miami-Dade HVHZ TPO projects), SureBond Primer for chalky masonry, and Lock-Down urethane primer for corrosion control.\u003c\/p\u003e\n\u003cp\u003eAdd GAF Cleaning Concentrate for substrate prep before any system. Factory-direct from a GAF-authorized distributor, with technical support on substrate-to-primer matching.\u003c\/p\u003e","products":[{"product_id":"gaf-lock-down-primer","title":"GAF Lock-Down Primer","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF Lock‑Down Primer?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eLock-Down Primer exhibits the unique ability to “wet” into weathered substrates, developing superior adhesion while resisting corrosive conditions, even when sound surface rust is present. Loose, flaking, or unsound rusted metal must be brought into sound condition or replaced. Lock-Down Primer is an excellent primer for use under acrylic or solvent-based roof coatings and industrial finishes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF Lock-Down Primer include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdhesion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Low viscosity allows it to penetrate and “wet” into weathered or sound rusted surfaces, imparting a tenacious chemical and physical bond between the substrate and subsequent top coat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeathering:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e After 2,000 hours of accelerated weathering exposure, coated panels showed no rust bleed, creeping, undercutting, or any deterioration along the Lock-Down Primer lines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalt-Spray Resistance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e After 500 hours of exposure to salt spray, the sample showed only minimal blistering and slight rusting along the primer lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"PAIL 5 GAL \/ 18.9L","offer_id":32362953408650,"sku":"890263000","price":438.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/products\/gaf_lock-down_primer_black_bucket_1000x1000_0c692177-9f29-4213-8d2f-d1ec415b061b.jpg?v=1588881021"},{"product_id":"gaf-surebond-primer","title":"GAF SureBond Primer","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF SureBond Primer?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSureBond Primer adheres firmly to all types of masonry, metal, and chalky surfaces.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF SureBond Primer include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeets most VOC emissions and regulations to eliminate facility downtime during installation\u003c\/li\u003e\n\u003cli\u003eEasy application and clean-up\u003c\/li\u003e\n\u003cli\u003eNo special equipment required to install\u003c\/li\u003e\n\u003cli\u003eGreat for re-coat applications!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eInstallation Options\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eApply SureBond Primer by brush or roller minimum 1\/2\" nap roller to area to the recommended coverage rate.\u003c\/li\u003e\n\u003cli\u003eCoverage rate will vary due to porosity of substrate\u003c\/li\u003e\n\u003cli\u003eAverage surface will require 0.25 – 0.4 gal.\/100 ft² (1.0 – 1.6 L\/10 m²)\u003c\/li\u003e\n\u003cli\u003eAllow to dry before proceeding with additional products\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"PAIL 5 GAL \/ 18.9L","offer_id":32378501824650,"sku":"890019000","price":262.49,"currency_code":"USD","in_stock":true},{"title":"PAIL 2 GAL \/ 7.6L","offer_id":45806222672094,"sku":"890018000","price":129.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/files\/GAF_SureBond-Primer-_4.jpg?v=1701829382"},{"product_id":"united-coatings™-united-cleaning-concentrate-ucc","title":"GAF Cleaning Concentrate","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF Cleaning Concentrate?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eGAF Cleaning Concentrate is non-toxic and leaves no pollutants or contaminating by-products to damage the environment. It has excellent cleaning capabilities with most types of coatings including acrylic, polyurethane silicone and Hypalon. Because GAF Cleaning Concentrate is 100 % biodegradable, it can be washed off the surface without any harmful effects to the environment or ground vegetation. It penetrates the old coating, lifting the oxidized material, dirt, grease, and other contaminants into suspension for easy flushing from the substrate, leaving behind an acceptable surface for re-coating.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF Cleaning Concentrate include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiodegradable:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Allows for proper cleaning of substrates where washing with hazardous cleaning products would not be permitted prior to (re)coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Dry Time:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Helps remove dirt, pollutants, and other contamination build-up even if the product dries prior to rinsing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafer for the Environment:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e UCC will not harm plants even in its concentrated form.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAgency Approvals:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Meets all the requirements of USDA and FDA standards, and is also OSHA compliant.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eInstallation Options\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eApplication: GAF Cleaning Concentrate may be applied by brush or low-pressure sprayer. Apply the diluted  cleaning solution (1 Gal Consentrate + 10 Gal Water) to the substrate under low pressure at a rate of 0.5- 0.7 Gal-Solution\/100 ft² (2-2.7 L\/10 m²).  Allow the solution to stand for a minimum of 15 minutes.  1 gallon of concentrate will clean approx 1,600 to 2,000 sq\/ft.\u003c\/li\u003e\n\u003cli\u003eLow areas and depressions in the substrate having excessive dirt build-up may require additional solution and\/or scrubbing with a stiff-bristled broom. Extremely stubborn areas may require treatment with a more concentrated dilution.\u003c\/li\u003e\n\u003cli\u003eRinse the surface with water under high pressure, utilizing either conventional spray or pressure washing equipment. Attach a wand or extension to the high pressure hose and use a standard coating spray tip to achieve maximum cleaning of the substrate. Repeat rinsing as required to remove all cleaning solution.\u003c\/li\u003e\n\u003cli\u003eAllow the substrate to completely dry prior to the application of any coating materials.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"BUCKET 1 GAL \/ 3.8L","offer_id":32378635583626,"sku":"890506000","price":87.76,"currency_code":"USD","in_stock":true},{"title":"PAIL 5 GAL \/ 18.9L","offer_id":32378635616394,"sku":"890507000","price":284.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/files\/Cleaning-Concentrate_no-shadow.jpg?v=1701828628"},{"product_id":"gaf-unibase-primer","title":"GAF UniBase Primer for Asphalt Roofs","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF UniBase Primer for Asphalt Roofs?\u003c\/h3\u003e\n\u003cp\u003eUniBase Primer for Asphalt Roofs is designed to enhance the adhesion of GAF Acrylic top coats or the HydroStop Premium System over approved surfaces, and as a saturant for fabric reinforcement applications. UniBase Primer for Asphalt Roofs also acts as an excellent asphalt bleed blocker. Unibase Primer is an easy-to-apply, cost-effective method of securing reinforcing fabric over surfaces prone to structural movement, allowing the stress to be distributed over a broader area of the roof coating system.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF UniBase Primer for Asphalt Roofs include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProducts can be brush, roll, or spray applied\u003c\/li\u003e\n\u003cli\u003eMeets all VOC emissions and regulations to eliminate facility downtime during installation\u003c\/li\u003e\n\u003cli\u003eEasy application and clean-up\u003c\/li\u003e\n\u003cli\u003eExcellent asphalt bleed blocker\u003c\/li\u003e\n\u003cli\u003eLow toxicity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"PAIL 5 GAL \/ 18.9L","offer_id":32378731790474,"sku":"890223000","price":218.62,"currency_code":"USD","in_stock":true},{"title":"DRUM 54 GAL \/ 208L","offer_id":32378731823242,"sku":"890502000","price":2738.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/products\/gaf_unibase_primer_hero_3600x1300d.jpg?v=1588881243"},{"product_id":"gaf-epoxy-primer","title":"Epoxy Primer (BLACK) (Not sold in California)","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF Epoxy Primer?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eEpoxy Primer is designed to penetrate and seal porous substrates and to improve the adhesion of high-performance top coats. It helps to “solidify” punky or chalky conditions; increases the bond of acrylic, polyurethane, butyl, and epoxy top coats to a variety of surfaces.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF Epoxy Primer include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdhesion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Penetrates and “wets” into porous surfaces, imparting a tenacious chemical and  physical bond between the substrate and subsequent top coat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-dusting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Penetrates deeply to eliminate concrete dusting, providing for easy cleanup and minimum maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Penetration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Low viscosity allows for penetration into dense surfaces such as smooth-troweled concrete floors, oriented strand board, fiberglass, and various types of metal surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-Spalling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Helps protect against the intrusion of destructive salts, oils, solvents, and gasoline. Also helps prevent spalling and pitting caused by freeze\/thaw cycling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"PAIL 5 GAL \/ 18.9L","offer_id":32378903134346,"sku":"8905","price":241.51,"currency_code":"USD","in_stock":true},{"title":"DRUM 54 GAL \/ 208L","offer_id":33055599722634,"sku":"8905","price":2477.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/products\/gaf_epoxy_primer_1000x1000_0a01f5a8-d11a-4b37-810e-65dafa10bf8b.jpg?v=1582291749"},{"product_id":"gaf-tpo-red-primer","title":"GAF TPO Red Primer","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF TPO Red Primer?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eTPO Red Primer is slightly tinted to distinguish primed areas on bright white TPO membranes. It is VOC compliant and easy to install; it rolls on with a foam roller and dries quickly. Application of coating or sealant can begin as soon as the primer has dried completely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF TPO Red Primer include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImproves adhesion of acrylic coatings and sealants to both new and aged TPO \u003c\/li\u003e\n\u003cli\u003eLow VOC \u003c\/li\u003e\n\u003cli\u003e5 gallon bucket covers 2,000 sq ft\u003c\/li\u003e\n\u003cli\u003eEach 15 oz aerosol can covers approx. 50 sq ft. (sold by the box of 12)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"PAIL 5 GAL \/ 18.9L","offer_id":32379001274506,"sku":"890930699","price":649.85,"currency_code":"USD","in_stock":true},{"title":"BOX OF 12 \/ 15 OZ AEROSOL","offer_id":48224274645214,"sku":"8908A","price":306.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/files\/Screenshot_2026-05-08_131128.png?v=1778260367"},{"product_id":"united-coatings™-roof-mate™-mb-plus-coating","title":"GAF Bleed Block Asphalt Primer","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy Bleed Block Asphalt Primer?\u003c\/h3\u003e\n\u003cp\u003eGAF Bleed-Block Asphalt Primer is\u003cbr\u003e a water-based acrylic primer used\u003cbr\u003e under GAF High Solids Silicone to\u003cbr\u003e provide bleed blocking on asphalt\u003cbr\u003e roofs.\u003cbr\u003e GAF Bleed-Block Asphalt Primer is\u003cbr\u003e designed for easy application with\u003cbr\u003e conventional or airless spray\u003cbr\u003e equipment, as well as brush or\u003cbr\u003e roller.\u003cbr\u003e\u003cstrong\u003e APPROVED SUBSTRATES\u003c\/strong\u003e\u003cbr\u003e New and existing asphaltic roofs.\u003cbr\u003e New asphaltic roofs should be\u003cbr\u003e weathered for at least 30 days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e APPLICATION\u003c\/strong\u003e: Apply by brush, roller,\u003cbr\u003e or airless sprayer evenly at the rate\u003cbr\u003e of 1.0 gallon per 100 ft2 for smooth\u003cbr\u003e asphaltic and 1.5 gallon per 100 sq ft.\u003cbr\u003e for granulated asphaltic surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e Benefits of Bleed Block Asphalt Primer include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eENERGY STAR certified (U.S. only) CRRC Listed rated\u003c\/li\u003e\n\u003cli\u003eLow VOC\u003c\/li\u003e\n\u003cli\u003eHighly reflective\u003c\/li\u003e\n\u003cli\u003eProvides asphalt bleed blocking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"5 gallon","offer_id":48234494918878,"sku":"8922920PQ-1","price":219.87,"currency_code":"USD","in_stock":true},{"title":"54 gallon","offer_id":48234494951646,"sku":"8923920PQ-2","price":2395.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/files\/GAFBleedBlockAsphaltPrimer.jpg?v=1723571338"},{"product_id":"gaf-unitile-lv-sealer","title":"GAF Bonding Primer (Formerly GAF UniTile LV Sealer)","description":"\u003ch3 class=\"description__title description__title--bordered\"\u003eWhy GAF UniTile LV Sealer?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eUniTile LV Sealer is a two component, solvent-based epoxy primer designed to seal porous substrates while improving adhesion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits of GAF UniTile LV Sealer include:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Viscosity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Allows sealer to penetrate very small crevices and preserve porous surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete Dusting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e In-depth protection helps reduce concrete dusting and minimize maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-Spalling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Helps protect and preserve concrete in a stable condition.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eVIDEO\u003c\/h6\u003e\n\u003ch6\u003eSPECS\u003c\/h6\u003e\n\u003ch6\u003eDOCS\u003c\/h6\u003e","brand":"GAF Primers \u0026 Cleaners","offers":[{"title":"BUCKET PART A: 5 GAL \/ 18.9L","offer_id":32385234501770,"sku":"890549000","price":352.91,"currency_code":"USD","in_stock":true},{"title":"BUCKET PART B: 5 GAL \/ 18.9L","offer_id":33056062079114,"sku":"890551000","price":352.91,"currency_code":"USD","in_stock":true},{"title":"PAIL PART A: 1 GAL","offer_id":35632033824926,"sku":"","price":116.34,"currency_code":"USD","in_stock":true},{"title":"PAIL PART B: 1 GAL","offer_id":35632035791006,"sku":"","price":116.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/5890\/2922\/products\/gaf_unitile_lv_sealer_part_a_b_1000x1000_db66e0b0-024a-4f21-844a-c52ebf7b783a.jpg?v=1582315365"},{"product_id":"gaf-multi-purpose-primer-kit-part-a-b","title":"Multi-Purpose Primer","description":"\u003ch4\u003ePRODUCT DESCRIPTION\u003c\/h4\u003e\n\u003cp\u003eGAF Multi-Purpose Primer is a two-component, water-based epoxy, 9 to 1 ratio primer. It is effective at increasing the adhesion of acrylic, polyurethane, butyl, and silicone coats over most new or existing roof, deck, and wall substrates, as well as existing coatings. GAF Multi-Purpose Primer is easy to use and clean up.\u003c\/p\u003e\n\u003ch4\u003eAPPROVED SUBSTRATES\u003c\/h4\u003e\n\u003cp\u003eConcrete, asphaltic, aged single-ply membranes, and existing coatings. It can also be used on non-ferrous metals, galvanized, aluminum, galvalume, and coated (including Kynar) steel.\u003c\/p\u003e\n\u003ch4\u003ePACKAGING SIZES\u003c\/h4\u003e\n\u003cp\u003e1-gallon kit Part A: 0.9-gallon (3.41 liter) can Part B: 0.1-gallon (0.38 liter) can 5-gallon kit Part A: 4.5-gallon (17 liter) pail Part B: 0.5-gallon (1.89 liter) can\u003c\/p\u003e\n\u003ch4\u003eSTORAGE \u0026amp; SHELF LIFE\u003c\/h4\u003e\n\u003cp\u003ePRODUCT STORAGE TEMPERATURE: 50°F - 90°F (10°C and 32°C). Do not open containers until ready to use the material. Do NOT allow the product to freeze. 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Call GAF Technical Support Services for spray recommendations. GAF Multi-Purpose Primer is not designed to form a heavy surface film. Over-application will reduce adhesion strength. Allow primer to dry. 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