Warranty
Roppe Rubber Stair Treads
Raised and Smooth Profiles
Product Data
Section 9
Resilient Flooring
Page 19 of 21 | © Roppe Corporation, Printed in the U.S.A.
6.4.3 ROP535U “Universal” Urethane Enhanced Epoxy Adhesive and ROPECC Epoxy Caulking
Compound for Individual Rubber Stair Tread, Stinger & Riser Installations.
Read all installation, product limitations/precautions, and maintenance literature before
proceeding. ROP535U Universal Urethane Enhanced Epoxy Flooring Adhesive is a solvent
free, non-flammable, high performance adhesive for indoor stair tread installations over porous
concrete, metal and other non-porous or flexing substrates, on grade, below grade, or above
grade. Caution: Before applying the recommended Roppe Adhesive, Quik-Stik Adhesive Tape
or ROPECC Epoxy Caulking Compound, the stair tread, riser and stringer’s entire backing must
first be thoroughly cleaned with Denatured Alcohol (always follow manufacturer’s
recommendations, cautions and warnings etc.) and a clean white cloth to remove contaminates
which could interfere with the bonding process. Once cleaned with Denatured Alcohol, allow
backing to dry completely before applying recommended Roppe Adhesive or ROPECC Epoxy
Caulking Compound and test to ensure a successful bond can be achieved. To secure the stair
treads vertical nosing to the rubber riser, first clean rubber riser with denature alcohol and then
ROPECC Epoxy Caulking Compound must be applied in a tight serpentine bead pattern
covering the entire width and length of the stair treads nosing. When installing over non-porous
substrates, ROP535U (required over metal and approved non-porous substrates) must be used,
or Quik-Stik Adhesive Tape. Secure stair tread nosing with Painters Tape until ROPECC Epoxy
Caulking has dried. Remove Painters Tape before exposing to traffic. DO NOT allow ROP535U
to come in contact with the portion of the step nosing where ROPECC Epoxy Caulking
Compound will be applied. The ROP535U must be used for installations in areas where the stair
treads will be subjected to lateral shear stresses and/or rolling loads, installed over metal, other
non-porous substrates, flexing substrates, Butting Stair Treads and in areas subjected to topical
moisture or other liquids, in areas where the substrate or flooring is not maintained within the
specified temperature range 65°F (19°C) and 85°F(30 °C). DO NOT mix partial units of this
adhesive, because the ratio of Part A to Part B is not 1:1. ROP535U Universal Urethane
Enhanced Epoxy Adhesive is packaged in two separate containers marked Part A (Urethane
epoxy resin) and Part B (polyamide resin, hardener). Remove the lids and add all of Part B into
Part A. Mix the combined parts with the furnished paddle using a rotary motion while at the
same time lifting from the bottom. A slow speed, 200 RPM maximum, drill with an attached
mixing paddle may also be used. Mix 4 minutes. After mixing, there should be no streaking.
Caution: Higher mixing speeds and/or longer mixing time will reduce the open time and can
cause premature curing of the adhesive. Adhesive will not cure if not properly mixed. DO NOT
allow the mixed epoxy adhesive to stand in the container. Immediately after mixing, pour the
contents onto the porous substrate and immediately spread the adhesive evenly using a 1/32” x
1/16” x 1/32” “U” -notch trowel, being careful to leave no puddles of adhesive. Note: Over
extremely porous or rough concrete, a 1/16” x 1/16” x 1/16” Square notch trowel may be
required. Caution: If to much adhesive is applied, oozing at seams, air-bubbles and
telegraphing may occur along with adhesive displacement when the tread is rolled or subjected
to rolling loads resulting in loose or unsightly areas If the substrate has been shot blasted, a
rough/porous underlayment has been applied, or the substrate is extremely porous, additional
adhesive may have to be purchased to ensure proper adhesive coverage. Caution: Spreading
adhesive on a large number of steps and treads could possibly allow the adhesives to cure or
setup before the treads are installed which would result in a bond failure. Caution: Allowing the