Stretch Guard Underseal

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HOW TO PREPARE SURFACE FOR STRETCH-GUARD 8875 UNDERSEAL SYSTEM? 

Surface Preparation: Proper roof preparation is essential for successful coating application. 1. The roof surface must be clean and free of all loose and oxidized material, dirt, oil and grease. 2. Thoroughly and carefully use a power blower or a stiff bristle broom and/or power wash the roof surface. (Do not power wash if the roof has any water leaks.) 3. Seam tape all cracks, seams, flashings, skylights, vents, etc. including laps on parapets walls using 8875 Underseal applied at a rate of 50 sq. ft per gallon. For older roofs and/or roofs with cracking, alligatoring, failing systems and minor leaks use polyester roofing fabric to reinforce the roof system (See System Guide.) An older roof in poor condition may need a new roof. Each application should be done in one complete step to form one seamless layer over the total area being covered. Some low sloped roofs may require a complete brush application around all the tab edges. Apply with roller, squeegee, brush or airless spray equipment. If applied by spray, 8875 Underseal must be back rolled. Do not thin. Prior to application of 8875 Underseal, seal all splits, vents, pipes and seams with polyester seam tape and 8875 Underseal.

HOW TO INSTALL STRETCH-GUARD 8875 UNDERSEAL SYSTEM USING POLY-SEAM TAPE?

1.  Poly-Seam Tape Application: Seam tape over ALL joints, cracks, seams, around vents, over flashings, caps, pipes and skylights, etc. Cracks over 1/16 inch should be cleaned and caulked before reinforcing. a. Brush a coat of 8875 Underseal over the joint or seam. b. Roll polyester seam tape into the wet Stretch-Guard 8875 Underseal. While still wet, apply another coat of 8875 Underseal over seam tape completely embedding tape in the coating. Allow to dry. c. Apply an additional full coat of 8875 Underseal over all seam tape applications. Allow to dry. Complete coating the surface at a rate of 1 to 2 gallons per 50 sq. ft to cover and fill in rough surfaces and pinholes.
2. Poly-Fabric Tape Application: Apply a liberal coat of 8875 Underseal. While still wet, embed the polyester fabric into the 8875 Underseal. Apply a second coat of 8875 Underseal to saturate the fabric (2 gallons per 100 sq. ft. is required) It is recommended that another coat of 8875 Underseal be applied over dried fabric system to smooth the rough surfaces.
3. Top Coat Application: Apply 2 coats of Stretch-Guard 8840 Elastomeric Coating as a finish coats at the rate of 1 gallon per 100 sq. ft. Apply a third coat if desired. Fill all cracks and crevices.

HOW TO INSTALL STRETCH-GUARD 8875 UNDERSEAL SYSTEM AS A WATERPROOFING SYSTEM? 

Heavy Duty Waterproofing System: 1. Seam tape application. 2. Apply primer Coat of 8875 Underseal at 1 gallon per 50 sq. ft. 3. Apply 8875 Underseal embedded in the polyester fabric with 1-2 additional coats of 8875 Underseal. 4. Apply 2 coats of 8840 Top Coat at a rate of 1 gallon per 100 sq. ft. If products are sprayed, it is recommended that the first coat be backrolled with a ¾” nap cover. Always allow proper drying between coats. (See Dry Time for each product.) Always check for proper adhesion prior to application of next coat. 

MAINTENANCE + HEALTH ADVISORIES FOR STRETCH-GUARD 8875 UNDERSEAL SYSTEM AS A WATERPROOFING SYSTEM? 

Thinning: Thinning is not recommended Drying Time: Initial cure 8 hours. Allow 8 hours before applying additional coats. Cool and/or humid weather conditions will slow the drying time.

Clean-up: Warm, soapy water is recommended

Additional Product Information: Application Specification Guide and Warranty Specification Guide.