Dynatrol I-XL

Dynatrol™ I-XL is a moisture-curing, single-component non-sag polyurethane sealant. It is designed to maintain an effective bond and seal between materials of similar and dissimilar surfaces, porosities and coefficients of expansion.

Limitations: Dynatrol™ I-XL should not be used: •
as a cap, heel ortoe bead in certain glazing installations with high-performance glass or plastic. •
in jointslessthan 1/4” (6 mm) in depth. •
in joints where contact may be made with polysulfide sealants. •
in areas exposed to harsh chemicals. •
on certain architectural paints and finishes without laboratory orfield testing. •
in horizontal jointssubject to vehicular traffic unless protected by a wearing surface. •
Although Dynatrol™ I-XL is considered a paintable sealant, due to variability in paint products and theirraw materials, installation conditions, installation techniques, as well as primers, it is required that the contractor who applies paint, pretest paint on sealant to determine suitability. Contractor is responsible for test as well as results. Oil based paints can exhibit a slow/non-curing condition. Field-test is required and user must determine suitability. Paintable after 7 days. •
Lighter colors may exhibit discoloration after extensive UV exposure. •
Light colors can yellow slightly if exposed to direct gas fired heating elements prior to formation of initial skin.

surface Preparation: Joint surfaces and backer rod must be dry and free of all contaminantssuch as oil, grease, wax, dust, corrosion, tar, asphalt, loose aggregate, frost, form-release agents and decorative and protective coatings. Precast panels using form release agents other than polyethylene film must be sandblasted or mechanically abraded and blown or brushed dust free. Glass, metal and other nonporous surfaces must be free of any coatings and wiped clean with solvent. Priming: Never a substitute for proper surface preparation, priming is not required on glass or anodized aluminum and usually not necessary on most other common building materials. However, varieties of brick, natural stone, plastics, paints, coatings and othertreatments of surfaces often present difficult substrates to which to adhere. Due to the number and unpredictable nature of these substrates, a field or laboratory test is recommended to determine the adhesion of Dynatrol™ I-XL with or without primer. When priming isindicated, P-75 or P-150 should be used on poroussubstrates and P-120 on nonporous substrates subject to applicable VOC regulations. Priming is required for all submerged Dynatrol I-XL applications. Consult Technical Services for details concerning primer selection and application. Never use P-75 on nonporous substrates. Dynatrol™ I-XL should be applied within eight hours after priming; otherwise, it will be necessary to reprime. Because architecturalstonessuch as marble and granite vary considerably in porosity,some bleeding of the sealant into the substrate is a possibility. A field or laboratory test to confirm this possibility is recommended. Pecora offers complimentary adhesion and stain testing in its laboratory on actual field samples ofsubstrate from the jobsite or on representative samplesfrom the same lots. Contact Technical Servicesfor details. Joint Backing: Backerrod controlsthe depth of the sealant and allowsit to be applied under pressure. Use a size that will compress 25%. Denver Foam open-cell polyurethane orreticulated (soft) polyethylene rod is recommended. Closed-cell polyethylene may be used but care must be taken not to puncture the rod which can cause outgassing or bubbling/blistering in the sealant. In jointstoo shallow for backerrod, use a polyethylene bond-breakertape to prevent three-sided adhesion. application: Jointsshould be masked to ensure a neat appearance. Sealantshould be applied in a continuous operation using sufficient pressure to fill the joint and make complete contact to the jointsides. Tool the sealantslightly concave using solvent or dry-tooling techniques. Do not tool with soap or detergent and water solutions. Tool Time (initial skin): 3-6 hours at 77°F (25°C); 50% relative humidity Higher temperatures and/or humidity willshorten thistime. cleaning: Use mineral spirits to remove excess sealant before it cures and to clean equipment. Refer to manufacturers MSDS. storage Life: One-Part urethanes are extremely moisture and heatsensitive. Dynatrol™ I-XL has a warranted shelf life of twelve monthsfrom date of manufacture when stored in original unopened cartridges or sausages at conditions not exceeding 80°F (27°C), 50% R.H. Consistently highertemperatures and/ or humidity willshorten thisshelf life. No shelf life is warranted on bulk packages of Dynatrol™ I-XL. Precautions: Contains diisocyanates. Contact with uncured sealant, with vapors generated during curing, or with dust formed from cured sealant may cause eye, skin, or respiratory tract irritation or allergic reaction. Do not breathe fumes, dusts, vapors or mist. Keep container closed. Use only with adequate ventilation or wear an appropriate NIOSH-approved respirator. Harmful if swallowed. Do not swallow or take internally. Do not get in eyes, on skin, or on clothing.Wash thoroughly after handling. Keep away from heat, sparks and flame. Repeated contact may, without symptoms, increase susceptibility of these effects. Refer to Material Safety Data Sheet (MSDS) for more information.